连通的开口和闭口谐振环构成的磁超材料设计
Magnetic metamaterial based on connected split and closed rings
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摘要: 在已有的磁超材料和左手材料结构中,负等效磁导率主要通过开口谐振环、平行短金属线对或者它们的变形结构来实现.这些结构要求入射电磁波的电场方向平行于基板.针对这一特点,利用将开口和闭口的谐振环相连通的思想,设计出了入射电磁波的电场方向垂直于基板型的三维磁超材料,并予以实验验证.该对称结构中金属线线宽的变化对磁谐振频率影响很小,有利于实际的加工和应用.同时,该结构对于设计三维以及具有极化无关、均匀各向同性等特点的磁超材料和左手材料具有参考价值.Abstract: Through connecting split and closed rings together,a three-dimensional magnetic metamaterial is proposed in this paper.When the electric field of the induced electromagnetic wave is perpendicular to the dielectric board,this construction exhibits negative effective permeability.Its magnetic resonant frequency is insensitive to the variation of the width of the metallic wires,which facilitates practical fabrications and applications.Meanwhile this construction is of significance for designing polarization-independent and isotropic magnetic and left-handed metamaterials.
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